Sanding-machine.



M. C. MULCAHY.

SANDING MACHINE.

I APPLICATION FILED SEPT.22 1917- 1 ,Q8,964. Patented Dec. 24, 1918.

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SANDING MACHINE.

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M. C. MULCAHY. SANDING MACHINE.

APPLICATION FILED SEPT. 22. 1917..

Patented Dec. 24, 1918.

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INVENTOR,

A TORNEYS;

TE PA SANDING-MACHINE.

Specification of Letters Patent.

Patented Dec. 24, 1918.

Application filed September 22, 1917. Serial No. 192,751.

To all whom it may concern:

Be it known that I MICHAEL G. MULCAHY, a citizen of the United States, residing at Beverly, in the county of Essex, in the State of Massachusetts, have invented a certain new and useful Improvement in Sanding- Machines, of which the following is a specification, reference being had to the accompanying drawings.

The immediate object of this invention is to provide simple and adequate means for effectively sanding slippery sidewalks, streets, crossings, etc., in contra-distinction to the methods now employed wherein the sand is manually spread upon the slippery surfaces. In my invention I also show convenient means whereby the sand may be heated in order that it will embed itself in the ice, if the surface is covered by the same. I have provided the annexed drawings for the purpose of clearly disclosing my invention, Figure 1 being a side elevation of my improved sanding machine and Figs. 2 and 3 being, respectively, rear and front views of the same. Fig. at is a relatively enlarged central, vertical, sectional view of my device showing several of the parts in their operative or opened positions. Fig. 5 is a plan view of the sanding discharge arms and their operating lever 39, and Fig. 6 shows a slightly modified form (partly broken away) of the sanding control, wherein the control proper is located outside the housing, and

Fig. 7 is a sectional view taken on the line 77 of said Fig. 6. Fig. 8 is a plan view of the feed cutoff and adjusting mechanism.

Referring now to the drawings, the numeral 1O denotes a substantial handle and 11 denotes a brace or support fixedly secured thereto, the said handle and brace being bolted, or otherwise secured by means of a bracket 12 to a tank 13. Fixedly secured to the lower circumferential portion of the tank are bearings letand 14 in which are journaled the axles of wheels 15 and 15 the said wheels and axles being held in their operative positions by any suitable means. Mounted upon the upper, and otherwise open, end of the tank 13 is a cover 16 which is held in place by extensions 16*, the said cover being provided with a handle 17.

Riveted to the front of the tank, preferably as shown, is a fuel container 18 having a hinged cover 19, the said container serving also as a fastening or support for one end f a spring 20. The fuel container 18 carries charcoal, or the like material, which is to be fed into the lower or furnace part 21 of the tank 13 through a door 22 which is hinged and held in its closed position in any suitable manner. Located within the upper portion of the tank is a sand receptacle 23 whose bottom is perforated in order to allow the sand ,to sift therethrough and, in order to facilitate the sifting process, I provide an agitator arm 24- which may be actuated whenever the sand becomes clogged or lumpy, it being my intention to place the sand, wet, frozen or otherwise, in the receptacle 23 then allow it to sift through the perforated bottom of said receptacle into the mid portion 25 of the tank 13, the sand being heated meanwhile by the fire in furnace 21.

The heated sand is conveyed by gravity from the mid-portion 25, through a chute 26, into the distributing or control box 27 from which it is allowed, or caused to drop upon the slippery surfaces by means which I will now explain. F astened to the bottom of the tank 13, at one end, are connecting bars 28 and 28 having their otherwise free ends secured to bearings 29 and 29 in which is journaled a shaft 30 upon which are mounted wheels 31 and 31 and a cam 32, the said cam being fixedly secured to the said shaft, as here shown; or said cam may be slidably keyed to the shaft if desired for a modification which I will hereinafter specify.

Situated directly above the cam 32 and fulcrumed, at 33, in a bearing secured to a cross-arm 3 1 that is riveted to the connecting bars 28 and 28 is a contact or actuating bar 35. This bar is pivoted at 36 so as to allow one end of the bar to be rocked in a horizontal plane whenever it is desired to move the end of the said bar out of contact with the cam 32. I also provide a removable piece 35" which may be taken off and a new piece substituted whenever the said piece becomes worn by frictional contact with the cam. Fixedly mounted in the bar 35 is a pin 37 which is provided for the purpose of engaging a connecting arm 38 which has its other end pivoted to an operating lever 39 which, in turn, is pivoted at 40 to one of the cross arm supports, or any other suitable place. Said lever has one end turned up, as at 41, to form a handle whereby the lever may be easily operated to throw the contact bar end 35 into and out of engagement with the cam 32 (as will be seen by reference to Fig. 5 of the drawings.)

It is obvious that a slight modification of the above described device may be used if desired, in which modification the bar 35 may be composed of one solid piece instead of being broken and pivoted at 36, and instead of throwing the said bar 35 into and out of contact with the cam, the cam may be slidably keyed to the shaft 30 and the lever arm 39 may be lengthened and the connecting arm'38 so designed as to engage and slide the cam 32 into and out of con tact with the bar 35 whenever the lever arm 39 is actuated.

' Pivoted at 42, to the otherwise free end of the bar 35, are arms 43 and 43 which are pivoted at 44 and 44 to any suitable support, preferably to the cross-arm 45 which in turn is riveted to the connecting bars 28 and 28. The arms 43 and 43 have their terminals secured to pins 46 and 46 that are journaled in and through the sanding control box 27 and said box may have one of its ends open for the purpose of cleaning out, if desired. Located Within the box 27 and fixedly secured to the pins 46 and 46 is a bar 47 which embodies a plurality of projections or spurs 48 which are provided for the purpose ofclosing the holes 49 at each downward movement of the bar 47, said movement being caused by the movements of the arms 43 and 43 by the bar 35 and cam 32. The drawings show the bar 47 in its openedor operative position.

In order to normally hold the bar 47 and projections in their closed positions I have secured a spring 20 to the arms 43 and 43, said spring having its other end fastened to box 18, as aforesaid, said arms being actuated, therefore, against the tension of said spring. the underside of the tank, in the position indicated, in any accept-able manner, preferably as shown, that is to say by means of riveted straps. To insure a more rigid construction than would otherwise be obtained I have inserted strengthening braces 50 and 50 which are riveted to the tank 13 and to the connecting bars 28 and 28, and also straps 51 and 51 For the purpose of retarding, shutting off and regulating the flow of sand from the chute 26 into the box 27 I have provided a feed cutoff 52. The said cutoff includes a handle 53, fixedly secured to the cutoff proper said handle being bored,

at suitable positions, for the purpose of en gaging a stop 54 carried in an arm which is affixed to the tank 13. In Fig. 4 the cutoff The box 27 may be secured to 52 is shown in its opened position'but said cutoff'may he slid inward, in suitable guide rails, or the like, until the sand is partly cut off from feeding into the box 27 or stopped entirely.

In Figs. 6 and 7 of the drawings I have disclosed a slightly modified form of sanding box and control, wherein the box proper 27 has flanges 55 and 55 constructed integral therewith for the purpose of protecting the bar 47 and spurs 48 which, in this case, are located outside the box 27 and therefore close the holes 49, on their upward movement, (the box, as here shown, is in its operative or opened position). The bar 47 is connected to the arms 43 and 43 by the usual pins 46 and 46 and is actuated in the same manner as heretofore described.

In the operation of my described device, assuming that the fire has been started and the sand heated and sifted to the box 27, the following movements occur. The bar 35 is thrown into contact with the cam 32 and the wheels "rotated, thereby transmitting a reciprocating movement to the bar 35 which movement is communicated to the arms 43 and 43 which transmit the said movement to the pins 46 and 45 which, in turn, move the bar 47 and the spurs 48 into and out of contact with the holes 49 in the box 27, thereby intermittedly opening and closing the holes to permit flow of sand to the slippery surfaces below the said box.

It is obvious that certain details, heretofore specified, may be modified without deia-rtin from the eneral trend or sco e of of the complete machine, for discharging the same from the heating chamber.

2. In a wheel supported sandingmachine, a sandbox, with a perforate bottom, a heating chamber located below the said box, means consisting of a revoluble arm for agitating the sand in the box, a perforated sand-delivery chute in the lower portion of the heating chamber, and means including a reciprocating arm and cam, operated by the trundling of the machine, for closing and opening the said perforations, to release and spread the heated sand.

MICHAEL oi MULCAHY. 7

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. G, 1 

